We're dividing 728193 by 15 
The aim is to understand the frequency of 15 in 728193.

Going ahead to step 1:
7 divided by 15 is 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Append the next digit (2) from the dividend to 7 and continue with: 72 / 15

Let's proceed to step 2:
The number 15 fits into 72 4 times, leaving a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtracting 60 from 72 leaves us with 12.
Grab the next digit (8) from the dividend, add it to 12, then carry on: 128 / 15

Moving on to step 3:
15 goes into 128 8 times with a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 48.0
The remainder is 8 after subtracting 120 from 128.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 15

Let's proceed to step 4:
15 goes into 81 5 times with a remainder of 6.
The number 5 becomes the next digit in our result. 
Result so far: 485.0
If we take 75 away from 81, we end up with 6.
Append the next digit (9) from the dividend to 6 and continue with: 69 / 15

Moving on to step 5:
15 can be fit into 69 4 times, resulting in a remainder of 9.
Use 4 as the next digit of our solution. 
Result so far: 4854.0
Subtracting 60 from 69 leaves us with 9.
Append the next digit (3) from the dividend to 9 and continue with: 93 / 15

Advancing to step 6:
When dividing 93 by 15, we get 6 with a remainder of 3.
The next digit of our result is 6. 
Result so far: 48546.0
If we take 90 away from 93, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 7:
15 can be fit into 30 2 times, resulting in a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 48546.2
The remainder is 0 after subtracting 30 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 8:
The number 15 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 48546.2
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
15 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 48546.2
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 48546.2 with a remainder of 0.0.